Question: What is signs of cause  of tetraethyl pyrophosphate ?
Paraphrase: What is signs and symptoms of motive of tetraethyl pyrophosphate ?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q933664 wdt:P1542 ?X . ?X wdt:P780 ?answer}
Answer: headache, fatigue, diarrhea, paralysis, vomiting, Nausea, heart arrhythmia, cyanosis, anorexia, hypotension, convulsion, cheyne-stokes respiration, runny nose, sweating, blurred vision, tear secretion, eye pain, chest tightness, twitching